Abstract: Padding (10) produced by means of 3D printing and comprising a multi-plane structure (11) comprising a plurality of overlapping layers (12), each of which is defined by an alternation of solids and voids, wherein the plan view conformation of each of said layers (12) is made according to at least one open and/or closed pattern, and in that said plan view conformation is variable.

Abstract: Method for producing a padding (10) by means of 3D printing by deposition of at least one first filament directly onto a portion of fabric (18) to make at least the first layer of a plurality of layers that define a multi-plane structure.

Abstract: The present invention relates to a process for producing polyhydroxyalkanoate oligomers and/or polymers of reduced molecular weight, which comprises reacting at least one polyhydroxyalkanoate (PHA) with at least one carbonate salt at a temperature of from 50° C. to 300° C., preferably from 120° C. to 200° C. The above reaction allows a controlled degradation of the PHA chains which yields oligomers and/or polymers having a controlled molecular weight, which can be modulated in view of the specific application for which the oligomers and/or polymers are intended. Moreover, during the reaction carbon dioxide evolves which produces a foamed material which can be easily processed on an industrial scale.